Comments on: Reshape a matrix without using a for loop http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/ Doug Hull is a proud MathWorker who is on a mission to help you with MATLAB. Fri, 10 Feb 2012 20:31:50 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Doug http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2963 Doug Tue, 10 Jan 2012 20:34:53 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2963 Vishnu, There is no randomness in reshape. It is deterministic, and will always give the same results for the same inputs. Doug Vishnu,

There is no randomness in reshape. It is deterministic, and will always give the same results for the same inputs.

Doug

]]> By: Vishnu http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2961 Vishnu Sun, 08 Jan 2012 22:39:04 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2961 Doug, I have a quick question, the answer to which I couldn't find anywhere. Does reshape work the exact same way each time you do it? For example, I want to reshape a 3D matrix to a single vector. However, each dimension means something to me and I need to do this for many 3D matrices and want the entries in the final vector to correspond to the same dimensions. So does reshape go through the 3D matrix in the same order every time I reshape a 3D matrix? Sorry if this is a dumb question.. I'm a matlab beginner. Thanks for your time! Doug, I have a quick question, the answer to which I couldn’t find anywhere. Does reshape work the exact same way each time you do it? For example, I want to reshape a 3D matrix to a single vector. However, each dimension means something to me and I need to do this for many 3D matrices and want the entries in the final vector to correspond to the same dimensions. So does reshape go through the 3D matrix in the same order every time I reshape a 3D matrix? Sorry if this is a dumb question.. I’m a matlab beginner. Thanks for your time!

]]> By: dan http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2789 dan Wed, 21 Sep 2011 06:08:57 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2789 Hi, sorry to bother you i think i got it. Thank you for you wonderful tips! Hi, sorry to bother you i think i got it. Thank you for you wonderful tips!

]]> By: dan http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2788 dan Wed, 21 Sep 2011 05:52:38 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2788 Do you mean this? a = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]; b = transpose(a); c = reshape(b,2,10) I still get the up and down result. Sorry I'm very new to matlab. Hope you can help.Many many thanks in advance. Do you mean this?

a = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20];
b = transpose(a);
c = reshape(b,2,10)

I still get the up and down result. Sorry I’m very new to matlab. Hope you can help.Many many thanks in advance.

]]> By: dhull http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2787 dhull Tue, 20 Sep 2011 19:18:09 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2787 @dan, Transpose it first, then reshape. Doug @dan,

Transpose it first, then reshape.

Doug

]]> By: dan http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2786 dan Tue, 20 Sep 2011 15:49:56 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2786 hello lets say i have a = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20] instead of reshape it up n down which will result to this 1 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 i want it to be like these 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 is it possible? Thanks in advance. hello lets say i have
a = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]
instead of reshape it up n down which will result to this
1 3 5 7 9 11 13 15 17 19
2 4 6 8 10 12 14 16 18 20

i want it to be like these
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20

is it possible? Thanks in advance.

]]> By: dhull http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2770 dhull Wed, 31 Aug 2011 15:59:52 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2770 Kwashie, What does it even meant to do these operations? I can not understand what that would even look like. Doug Kwashie,

What does it even meant to do these operations? I can not understand what that would even look like.

Doug

]]> By: Kwashie http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2768 Kwashie Wed, 31 Aug 2011 12:26:57 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2768 I have a 1 x 6 matrix which i need to add to a 1 x 12 matrix after which i have to multiply by a 1 x 18 matrix. Can you please guve me an idea on how i con do that. Thanks I have a 1 x 6 matrix which i need to add to a 1 x 12 matrix after which i have to multiply by a 1 x 18 matrix. Can you please guve me an idea on how i con do that. Thanks

]]> By: dhull http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2434 dhull Mon, 08 Nov 2010 16:32:59 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2434 @Jerry, There might be some clever way to do this without for loops, but it would be confusing and non-intuitive. Just use a clear and easy loop to do this. Doug @Jerry,

There might be some clever way to do this without for loops, but it would be confusing and non-intuitive. Just use a clear and easy loop to do this.

Doug

]]> By: Jerry http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2416 Jerry Fri, 05 Nov 2010 21:20:19 +0000 http://blogs.mathworks.com/videos/2009/03/13/reshape-a-matrix-without-using-a-for-loop/#comment-2416 Hi Doug, I also have a question about row-wise transformation. suppose a=[ 1 2 3 4; 5 6 7 8], if I want to get b=[1 2; 5 6; 3 4; 7 8]. Is there a simple way of using reshape without for loop? Thanks in advance. Jerry Hi Doug,

I also have a question about row-wise transformation.
suppose a=[ 1 2 3 4; 5 6 7 8], if I want to get
b=[1 2; 5 6; 3 4; 7 8]. Is there a simple way of using reshape without for loop? Thanks in advance.

Jerry

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